Abstract
This is an addition to a previously published monograph of the Texanitinae (MATSUMOTO, 1970). A new species of Texanites is described on the basis of a recently obtained specimen from about the middle of the Santonian in the Oyubari district, central Hokkaido. It is allied to Texanites (Texanites) hour-cqui COLLIGNON, from the Middle Santonian of Madagascar, but is distinguished by its rursiradiate, distant ribs, inequidistant configuration of tubercles and diverging deep branches of L in the suture. As an appendix, notes are given on the biostratigraphic subdivision and correlation of the Santonian primarily on the grounds of texanitine species.
